#4 Inverted graph bug fixed

By default Networkx starting node position (0,0) is in the bottom left. This is now inverted - starting node position is in the top left. This is done to match the order in the sudoku board (matrix visualisation).

sudoku/app.py

@@ -54,6 +54,9 @@ def _generate():
     global size
 
     # Reset
+    for child in tab1.winfo_children():
+        child.destroy()
+
     for child in tab2.winfo_children():
         child.destroy()
 

sudoku/modules/graph.py

@@ -27,7 +27,7 @@ def _add_nodes(self, board: list):
         for row in range(len(board)):
             for col in range(len(board)):
                 label += 1
-                self.labels[(row, col)] = label
+                self.labels[(col, row)] = label
                 self.display_labels[label] = board[row][col]
                 self.board.add_node(label)
 
@@ -115,6 +115,7 @@ def show_graph(self):
     def get_figure(self):
         plt.clf()
         pos = dict((v,k) for k,v in self.labels.items())
+        plt.gca().invert_yaxis()
         nx.draw_networkx(
             self.board,
             pos=pos,